Outfielder Charlie Blackmon has gone from prospect to patient the past two springs, felled by injury and illness.The 26-year-old hasn't played since March 1 and will miss more playing time because of a knee infection that landed him in a hospital.Blackmon cut his knee sliding, then wore a protective sleeve that he believes somehow created the infection."I didn't have the high fever or anything like that, but I knew something was wrong," said Blackmon, who was sidelined by a turf toe injury late last spring, costing him a roster spot.He entered camp as a longshot to make the team but was turning heads with his power during the first week. Blackmon returned to the Rockies' clubhouse Sunday but has been prescribed rest. He's not allowed to work out for a few more days, let alone perform baseball activity.

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